Originally Posted by beastaudio
good deal, how is the actual sub mounted inside there? looks a little tight... more I think about it, I would be able to fit one of these laid flat in front of my screen so I am now considering it strongly. will more than likely be better than a dual opposed MFW setup. how will the enclosure do with music though? rock,rap style stuff.
Mine weighs 148 pounds. I built it with the cheap imported "birch" 13-ply from Home Depot that I've been looking to get rid of for a while...what better place to put it than into a test mule that might not work out.... Arauco might be a bit lighter, true Baltic birch might be a bit heavier.
The sound? Simply put, it is a horn, and horns sound clean because distortion is lowered. They don't seem as loud as a result, but I can assure you, they are plenty loud. I've not listened to music with mains through it yet (not enough daylight....and no help to move it....) but it measures and sounds better than what I am listening to now.... Well, that and I know if I did get it inside, I'd wind up dragging my other sub out instead....and I have not painted this cabinet yet.
Compared to a dual opposed MFW in a sealed box? While a pair of 15s makes for a capable sub, I doubt you could get 21 Hz at 115 dB with 300 watts into one dual-opposed MFW cabinet at less than 10% THD. I ran out of amp at 114 dB and ~5% THD.....
The sub mounts against the cutout inside the back chamber. The cutout and chamber are sort of visible in the picture of the insides in Post #1. There is plenty of room, I can fit a Tempest X2 in there with room to spare. I use Hurricane nuts and allen screws to mount the driver. Since I've started properly installing hurricane nuts, I've not had problems.
Here's how I install hurricane nuts:
Drill the right size hole in the right places (with a backer board to avoid chipout),
slightly countersink the flange side (opposite the driver),
clean the hurricane nuts with acetone or brake cleaner,
start a hurricane nut in the hole,
apply PL to the shank with a bent wire,
drive it in place with a hammer,
repeat as necessary,
then chase the threads with a tap when the PL is dry.
Here is a pic with a few notes about what goes where.
Here's a view (sort of) looking inside the chamber through the baffle. Pardon the messy shop.